This is a salt water swimming pool waterfall. As you can see there is an ugly calcium build up on these very nice deep blue tiles. I am shooting at an extremely low pressure as to do no harm to the tile. I had to get into a raft in order to complete the lower half of this wall. If your pool tile could use a bit of a face lift and you live in southern Oregon or northern California you should give me a call at 541-664-5013 I am a licensed, bonded, and insured contractor. I vaccum up all debris with my portable pool vac. I also clean up the deck and of all debris from blast process. Thanks for your interest - Geno Gates